Comment by masklinn

It's not hard to run the number and see how likely it is (spoiler alert: not very).

The first easy number is the sheer amount of energy, diesel has an energy density of 10.7kWh/L, so a 30gal tank holds 1460kWh. By comparison a silverado EV (probably the best currently available EV tower short of a semi) has a 215kWh battery.

The second more complicated number and why diesel is so good at towing (and other high-power applications) is that diesel gets more efficient when loaded, by a factor of 2-ish: an unloaded diesel might only use ~20% of the fuel it burns to actually move stuff, or on a 30gal you get around 300kWh out of your 1460kWh tank, but that will climb to 35~40% as the load increases if kept in the efficiency range, so towing you might have 500~550kWh out of 1460kWh available to actually move your load.

There's no such thing on an EV, there's some variation but load isn't really a factor, pretty much just the band, so your Silverado gets 205kWh usable at the wheels unloaded and the same loaded. Therefore all the towing losses (rolling resistance and drag) come straight out of your range.

And short of a breakthrough on batteries it's difficult to add more battery capacity, the battery already accounts for a third of a silverado's weight and a significant fraction of its internal volume. Getting a 500kWh battery in a truck is currently impossible: that's the sort of capacity you find on semis (european EV semis cluster around 550~650).

And then of course you have the charge concern, charging a 500kWh battery in half an hour requires a megawatt charger running at more than 1MW, and the ability to ingest that in your pack (on 800V battery tech that's 1250 amps, which is within MCS specs but the vehicle side is pretty damn rough).